Air-compressing apparatus



Oct. 1, 1929. J K JR 1,730,319 F AIR COMPRESSING APPARATUS Filed June 6, 1928 5 Sheets-Sheet l gi E &

Oct. 1, 1929. J, J L s JR. 1,730,319

AIR COMPRESSING APPARATUS Filed June 6, 1928 5 Sheets-Sheet 2 LIZ , INVENTOIR; .Jizmes JJh'Z/fs, Jr,

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Oct. 1, 1929. J J, lLKs, JR 1,730,319

AIR COMPRESSING APPARATUS Filed Jun 6, 1923 3 Sheets-Sheet 5 1 (5 p# I wfii 52 55 I WITNESSES g I INVENTOR:

TTORNEYS.

Patented 1, 1929 umm mm PATENT orrlcc JAMES J'. DILKS, 3B; OF WEST COLLINGSWOOD, NEW JERSEY, ASSIGNORJTO THE NEW- MATIX EQUIPMENT 60., OF AUDUBON, NEW JERSEY, A. CORPORATION OF NEW JERSEY Application filed June 6,

This invention relates to air compressing apparatus, and more articularly to compressing ap aratus use 1' in connection with garages an automobile servicing stations for the purposes of tireinflation, etc.

The main object of my invention is to provide an air compressing apparatus especially adapted for the purpos'e indica'ted which is simple in construction; free from liability to easy derangement; extremely compact, inexpensive 'to build; and, moreover, entirely automatic in its operation, i. e. capable of maintaining at all times an adequate supply of compressed air. between predetermined pressure limits without'necessitating any attention whatever on the art of an operative except perhaps for lubrication or release of accumulated condensation at protracted intervals.

Other, objects and attendant advantages will be manifest from the detailed description which follows, when taken in connection with the accompanying drawings; whereof Fig. I shows a side elevation of an air compressing apparatus conveniently embodying my invention. 1

Fig. II is a plan view of the orgamzation Fig. III is a fragmentary sectional view,

taken as indicated by the arrows III--III in Fig. II.

Fig. IV is a detail. section, taken as indicated by the arrows IV-IV in Fig. III.

Fig. V is a cross sectional view,.in accordance with the arrows VV in Fig. I; and,

- Fig. VI is a detail sectional view on a larger scale, taken' as indicated by the arrows VIVI in Fig. 11.

With reference first more particularly to Figs. I and II of these illustrations, it will be observed that my improved air compressing apparatus comprises a storage reservoir in the form of a cylindric tank 10, the same resting at opposite ends upon cradle blocks 11.

Coordinated with the cradles blocks 11 are saddle blocks 12 which fit across the top of.

the tank 10; and tie bolts 13' are employed to clamp the blocks 11, 12 securely to said tank. The saddle blocks 12 in turn support an elon gated bed-plate 15 which is co-extensive in AIR-COMPRESSING APPARATUS 1928. Serial No. 283,147. I w

length with i the tank 10 and secured by Mounted on the bed plate 15 at one end is a compressor 17, and at the opposite end, an electric motor 18 from which power is delivered through the medium of an endless driving belt 19. The compressor 17 is preferably of the self lubricating type shown and described in my co-pending application, Serial No. 283,148, concurrently filed herewith; although, if desired, any other form of compressor may be employed instead,

is conducted away by a vertical pipe 25 connecting directly into the tank 10.

The operation of the motor 18 is controlled by a pneumatically actuatedautomatic switch device comprehensively designated by the numeral 26 which device may be of any of the standard commercial types available on the market. This switch device 26 is afforded support on a horizontal pad 27, inte-' grally formed with a manifold 28 (Figs. I- IV) fastened by end bolts 29 to the bed-plate 15 along its frontal edge. As shown, the manifold 28 "provides. a number of upward and downward bosses 30, 31, 32, 33 and 34. To the boss 30 is connected a pipe 35 which leads to the pneumatically-actuated motor controlling switch device 26; while a ipe 36 extends from the co-axial depending oss 34 to the reservoir 10. The bosses 32 and 33 serve for attachment of auxiliary devices including a safety valve 37 and a pressure gage 38.

From Figs. I and II it will be further noted that the motor 18 is not directly secured to the bed-plate 15, but mounted on a carriage 40 which is slidable on parallel guide rods 41 fast in lugs 42 of longitudinally on the drive belt 19 in correspondence with the greater demand made on said compressor as the pressure builds up in the tank 10. Such action is automatically brought about by a pneumatic diaphragm device which is (0111- prehensively designated by the numeral 45 in the assembly illustrations of Figs. I and II, and detailed on a larger scale in Fig. VI. As shown in the latter figure, the diaphragm device 45 comprises anannular casing 46, which, in the present instance, is integral with the bracket member 43, previously referred to, centrally of its forward end. Clamped between the casing 46 and its domed cover member 47, is a diaphragm 48 constructed of flexible material so as to be responsive to air pressure admitted via a pipe connection 49 leading from the boss 31 of the manifold 28. Through the medium of a piston-like follower 50, within the casing 46 of the device 45, the movement of the diaphragm 48 is communicated to the carriage 40, said follower having an axial stem 51, guidedin a bearing boss 52 of the casing 46, and contacting with a screw bolt 53 ad ustable in the contiguous end of the motor carriage 40 as shown in Fig. VI. Thus, as the pressure in the tank 10 increases, the diaphragm 48 of the device 45 will be 'urged moreand more toward the right with attendant shifting of the motor carriage 40, and gradual tensioning of the drive belt 19 with avoidance of slippage.

- In order to relieve the compresor 17 of the pressure generated incidentaltooverrunning of the motor 18 under its own momentum upon interruption of current thereto, I connect into the delivery pipe 20 immediately before the check valve 20, a coiled tube 55 whichleads io a valve 56 associated with the neumatically-actuated switch device 26.

his valve 56 is automatically opened with operation of the switch device 26 to interru t the circuit to the motor 18. The coiled tu e 55 functions as an auxiliary condenser from which the moisture accumulated during 'the operating phases of the compressor 17 is blown off with the air when the relief valve 56 is opened.

- The operation of the a paratus is as' follows: Assuming the switc control device'26 to be adjusted to function between predetermined pressure limits, say between 110 and 150 lbs. per sql. in., the compressor 17 operates to continuous y deliver air into the reservoir or tank 10. As the pressure increases, the tension on the belt 19 will be correspondingly increased to prevent slippage and insure proper functioning of the compressor 17 at all way constantly maintained in the tank 10 for tire inflation or any other purposes in connection with garages or automobile servicingstations, the supply being available through a discharge pipe 57 connecting axially into one end of said reservoir tank 10 and under control of a hand valve 58 protected-within the hollow at that end of said tank.

Having thus described my invention, I claim:

- 1. In air compressing apparatus of the character described, the combination of a storage reservoir, a compressor, a belt, a driving motor, and automatic means to increase the tension of the belt concurrently with greater demand on the motor as the pressure builds up in the reservoir.

2. In air compressing apparatus of the character described, the combination of a storage reservoir, a compressor, a belt, a driving motor, and pneumatically actuated means effective to automatically increase the tension of the belt concurrently with greater demand on the motor'as the pressure builds up in the reservoir. 1

3. Inaircompressing apparatus of the character described, the combination of a storage reservoir, a compressor, a belt, a drivlng motor, and means embodying a pneumatically responsive diaphragm effective to storage reservoir, a compressor, a belt, a driving motor, a sliding support for the motor, and automatic means for shifting the motor support to increase the tension of the belt concurrently with greater demand on the motor as the pressure builds up in the resenvoir.

5. In air compressingjapparatus of the r character described, the combination of a storage reservoir, a compressor, a belt, a drivlng motor, a sliding support for the motor, and means with a pneumatically responsive diaphragm in communication with the reservo1r and operative upon the motor support to automatically bring about increase in belt tension concurrently with greater demand on a safety valve, and piping extending to the reservoir and the compressor.

7 In air compressing apparatus of the character described, the combination of a storage reservoir, a bed plate over the reservoir, a compressor, a relatively slidable electric driving motor therefor, a pneumatically actuated automatic switch means for controlling the motor, and a manifold secured to the bed plate'providing a supporting pad-for the pneumatically actuated automatic switch and affording connections for piping to said reservoir,said.compressor and said switch means.

8. In an air compressing apparatus of the character described, the combination of a storage reservoir, a compressor, a separator trap between the compressor and the reservoir, a check 'valve interposed in a pipe fold secured to the bed plate affording conmotions for piping to the compressor, the reservoir and the pneumatically actuated means aforesaid.

In testimony whereof, I have hereunto signed my name at Audubon, N. J this 4th day of June, 1928.

. JAMES J. DILKS, J12:--

branch leading from the separator to the con- I denser trap, an auxiliary coiled tube separator connecting into the ipe branch aforesaid in advance of the chec valve, and a relief valve at the terminus of the tube separator adapted to be opened automatically upon stoppage of the compressor to relieve the latter of compression with attendant expulsion of accumulated moisture condensation from said tube condenser.

9. In air compressing apparatus of the character described, the combination of a storage reservoir, a compressor and an electric motor for driving it, a flow pipe with a check valve therein extending between the compressor and the reservoir, an automatic motor control switch with an associated relief valve adapted to be opened with interruption of current to the motor, and an auxiliary coiled tubular connection constituting an auxiliary condenser interposed between a point in advance of the check valve in the flow pipe aforesaid and the relief valve associated with the switch, whereby the compressor is relieved ofcompression and moisture condensation incidental to overrunning of the 7 motor after opening of said switch. I

10. In air compressing apparatus of the character described, the combination of a storage reservoir, a bed plate over the reservoir with a compressor mounted thereon slidably supported on the bed plate and a motor belt-connected to the compressor, a pneumatically actuated means for automatically shifting the motor to compensatively increase the tension on the drive belt concurrently with demand on the motor as the pres sure builds up in the reservoir, and a mamiao 

